Teeth and links for chain saws.



B. T. PURSBR'. TEETH AND LINKS FOE CHAIN SAWS. APPLICATION FILED NOV. 13. 1908.

9453599 Patented Jan. 4, 1910.

. To all whom it may concern:

' The'links f the UNITED STATES PATENT. onnion.

EDWARD r. runsnn, oFsAN FRANCISCO, CALIFORNIA. .assrenonlzro ENDLIESS enamsaw. on. A oo'nronarrron 0-. ARIZONA TERRITORY.

- TEETH AND LINKS FOR CHAIN SAWS v Be it'known that I, Enuxuui T. PURSER, a

citizen of-th United States, residing at San Francisco, in the county of, San Francisco,

State of Califbrnim-have invented new and useful Improvements in Teeth and Links for Chain Saws, of which the specification.

My invention relates to chain saws, and it is the object of my present invention to im provegthe details'of construction both "of the teeth and the links of such. chain saws,-

so as to secure 'etfective'action with ease and cheapness of construction and great durability.

Inthe accompanying drawings, Figure l is a plan. view of'two links of the chain saw embodying my improvements. Fig. 2 is an edge view of the same; Figs. 3, 4, 5 show de-' tails; Figs. (iand 7 show modified forms of the links; Figsfi'5 and 7 being on reduced scale. Fig. 8 shows an edge vview of a ta pered link. v v

I prefer -to utilize my improved saw in cutting on a.concave1ine, though I do not limit myelf in this connection.

As shown in F'gs. 1, 2, 6 and 7, the chain saw is made up of a series of double links,

one of. which, C, carries two cutting teeth,

D, one of which teeth, by engaging in a sprocket wheel or other suitable driving device, may bensed to put the saw in motion;

and the other linkcarries a clearing tooth B, which also by engaging with a sprocket wheeler other suitable device, ma be used to put the saw in motion. I pre er to use the latter tooth B as a means of driving the saw, but I do not limit myself toit. In both cases the back of, the tooth is the art which engages with the sprocket whee "or otherdriving device.

I form' shown in Figs. 1 and 2 are ma'de'up asfollows: I providea center plate, as shownin Fig. 3, and it has a recess a, which is ada ted to receive the base of the tooth B, whic fits snug}? within the recess a. .The plate A'is of 1 length of the link, and has rounded ends with open- 'covering the reces's therein and the en ings therein, as at b, to receive the usual rivets. In order to rovide for securely holding the tooth B in p ace, I utilize filler plates,

as shown in Fig. 4 at o,'and place one on following is av g Specification of Letters Patent. Patented Jan, 4,1910. Application filed Novemb:r'33,' 1908.

Serial No; 462,504.

cure the parts together by a rivet 'd, which passes through thetwo filler plates and the base. of the tooth B. -I furt-her secure the parts together by rivets c, the corners or ends of the fil er plates 0, and the intermediate plate A. The projecting end of the tooth B,as heretofore described, is provided .0. o e face with an edge designed to clear out we kerf, while its rear face engages with the sprocket or other driving connection.

passing tlIYE -gh.

In the construction of the other, or. altcrnating, l"tk utilize two outer plates, both being of the i'ull length of the link, one of which is shown on a reduced scale inidetail ends which overlap the ends of the iintermediate plate A of the preceding link, and

'are swiveled thereto by means of rivets.

Each plate Q has a recess, out of line withone another, adapted to receive a cuttin tooth D, the back of which may be utilized, to engage with the sprocket or other driving connection. ,Between these tooth carrying plates I place a filler, plate a, this filler plate beingriveted to the outer plates by four rivets 6, while the cutting teeth are secured by rivets which pass through one of the outer plates and the intermediate plate. The teeth are further supported by reason of the fact thattheirf edges where fitting in the plates are beveled, and the recesses in the .7 in F 1g; 5 .at C.- lhese plates have rounded outer platesare beveled to correspond. The

cutting ends, or'po ints, of these teeth are bent outwardly, or flared, slightly as shown in Fig. -2, and thus-a cut is made slightly exceeding the thickness ofthe link, thereby preventing any dan er of undue friction be- I 106" Sand-7 the latter on a reduced scale, w e of the same shape-anisize as those shown'in Fi 1; and 2, are each",

made out ofpne solid piece of iron or steel? or other suitable metal, and are not built up 'of plates. .Recessesior. the teeth, similar to those shown infthe built up links, are milled,

as'fa'ie. also, the ends of the malelinks A,

whilethe ends of the female'iifiks C are slotted either by milling or sawing, so as to he/same effect can b receive the milled ends or me male links. The teeth are riveted into the recesses milled -in these links, and these recesses are beveled to correspond with the beveling'on' the base of the inserted teeth.

While Iprefer to slightly flare the ends of the cutting teeth,' and, thereby, prevent any binding of the saw whilein work, yet produced by slightly tapering the links fr I ting edges, to their backs, as shown in Fig. 8.

\Vhat I claim is: i

1. In a chain saw, a link composed ofa central plate, having a recess, 'atooth fitted In their fronts, or cutto said recess, and filler plates holding tl tooth in place, substantially as described.

2. In a chain saw, a link comprising filler plate and two outer plates, having 1' cesses in staggered relation to each othe and cutting teeth fitted to said recesses, sul

stantially as described.

In testimony whereof I have affixed m signature in the presence of two witnesses. I EDlVARD T. PURSER.

\Vitncsses:

' FRANK L OWEN,

A. D1XON. 

